PCCB Brake Disc Wear Appearance

Friction surfaces after normal brake load while driving on roads. No surface fractures present -
Brake discs do not need to be replaced!

Fig 1: Identifying Brake Disc Friction Surface Bores (Perforations)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Friction surfaces after a long journey and occasional high load. Isolated cases of connected surface fractures less than 1.2 cm²-arrow- .
No replacement necessary as the connected surface fractures are < 1 cm² !

Fig 2: Locating PCCB Surface Fractures
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
End of service life of friction surface or after highest load on a racing circuit.
Replace brake discs if the connected friction surface damage is > 1 cm²-arrow- . To do this, follow the instructions provided under → 465102 CHECKING FRONT PCCB BRAKE DISC (WEAR ASSESSMENT) .

Fig 3: Locating PCCB Friction Surface Damage Area
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The best way to detect a surface fracture is by checking the wear indicators. Based on the wear indicators, this means that at least one wear indicator -arrow- must have a surface fracture of > 50 % (damage > 1 cm² /entire surface of a wear indicator with a surface area of approx. 1.2 cm² ).

Fig 4: Locating PCCB Surface Burnout On Wear Indicator
Courtesy of PORSCHE CARS NORTH AMERICA, INC.